Question 1

What is the working pressure rating?

Accepted Answer

15,000 psi working pressure, 15K class. The choke body is rated at the full pressure class; the trim (stem, bean, seat) is sized to handle the rated ΔP at the bean orifice. Note: pressure drops across a choke can be severe — specify both upstream and downstream pressures on the RFQ to confirm trim suitability.

Question 2

What is the difference between Adjustable and Positive chokes?

Accepted Answer

Adjustable chokes use a handwheel-controlled threaded stem to vary the orifice opening — the operator can dial in any flow rate from fully closed to fully open. Position indicator on the bonnet shows current opening. Positive chokes have a fixed orifice (bean) of a calibrated size — the bean is interchangeable to change settings, but cannot be varied during operation. Adjustable for active flow control; positive for stable, repeatable flow allocation.

Question 3

What does the trim model "FC-140" indicate?

Accepted Answer

FC-140 is the trim family designation — FC-140 is a positive-bean 2-inch trim, commonly stocked across 1502 Weco-union frac iron. Bean / orifice maximum: 3/4 in max.

Question 4

What end connections does this choke use?

Accepted Answer

Inlet: 2 in 1502 Female Weco Union. Outlet: 2 in 1502 Male Weco Union. These are Weco wing-union connections — the standard for frac flow iron.

Question 5

Is this choke suitable for sour-service (H₂S) wells?

Accepted Answer

No — this is standard-service rated. For sour wells, specify the NACE MR0175 compliant variant on the RFQ.

Question 6

How are positive choke beans sized and changed?

Accepted Answer

Beans are calibrated to a specific orifice diameter (typically 1/8" to 3/4" or 2" depending on trim family) and are interchangeable. To change the flow setting, bleed line pressure, open the body, swap the bean, reinstall. Indus stocks a range of bean sizes covering common allocations; for non-standard orifices, machined-to-spec beans are quoted on request.

Question 7

What materials are used for the body and trim?

Accepted Answer

Body: Forged AISI 4130. Trim (stem / bean / seat): Tungsten-carbide bean + Inconel 625 stem + TC seat. Seals: RPTFE back-up + Viton (FKM) primary seals. Tungsten-carbide hardfacing (or full TC inserts) on the bean and seat is standard for sand-laden flow. Inconel 625 trim is available for severe sour environments.

Question 8

What is the lead time?

Accepted Answer

Typical lead time 35 working days ex-works. 15K-class chokes are typically build-to-order — confirm OEM build slot at quote stage. Sour-service variants add 5-15 days for material certification.

Parameter	Value
Nominal Size	2 in
End Connection (Inlet)	2 in 1502 Female Weco Union
End Connection (Outlet)	2 in 1502 Male Weco Union
Bore Type	Standard

Parameter	Value
Working Pressure	15000 psi
Pressure Class	15K
Service Class	Standard

Parameter	Value
API Specification	Other
PSL Class	N/A
PR Class	N/A
Material Class (API 6A)	N/A

Parameter	Value
Body Material	Forged AISI 4130
Trim Material	Tungsten-carbide bean + Inconel 625 stem + TC seat
Seal / Elastomer Material	RPTFE back-up + Viton (FKM) primary seals

Positive Choke, FC-140 Trim, 2 in × 1502 F×M, 3/4 in Max Bean, 15,000 psi, Standard, 9/16 in Autoclave, No Cap

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